Once there, a series of chemical reactions ( the Sabatier reaction coupled with electrolysis ) would be used to combine a small amount of hydrogen ( 8 tons ) carried by the Earth Return Vehicle with the carbon dioxide of the Martian atmosphere to create up to 112 tonnes of methane and oxygen.

Once the electron is displaced from the photosystem, the electron is passed down the electron acceptor molecules and returns to photosystem I, from where it was emitted, hence the name cyclic reaction.

Once again, the neutron energies measured were not consistent with those of neutrons produced by a d-d fusion reaction.

Once the potentially useful microsatellites are determined ( removing non-useful ones such as those with random inserts within the repeat region ), the flanking sequences can be used to design oligonucleotide primers which will amplify the specific microsatellite repeat in a PCR reaction.

Once the acid is more than 95 % deprotonated the pH rises rapidly because most of the added akali is consumed in the neutralization reaction.

Once the limerent reaction has initiated, one of three varieties of bonds may form, defined over a set duration of time, in relation to the experience or non-experience of limerence.

Once more ( as with Live and Let Die and Dr. No ) it is Bond the British agent who has to sort out what turns out to be an American problem and this can be seen as Fleming's reaction to the lack of US support over the Suez Crisis in 1956 as well as Bond's warning to Goldfinger not to underestimate the English.

Once the chain reaction started in the plutonium, the momentum of the implosion had to be reversed before expansion could stop the fission.

Once the Axis commanders had divined the Allies ' intentions, the Allies began to see some reaction from the Axis field divisions waiting inland, the Hermann Göring and Livorno Divisions.

Once this reaction is complete, the furnace can be returned to service.

Once, in reaction to a call to hightlight that products from Israeli settlements sometimes had been labeled to fit into the EU-Isarel tax-free trade agreement, Mazel stated that the Swedish Archbishop K. G. Hammar " probably is an anti-semite.

Once the temperature reaches 100 million – 200 million kelvins and helium fusion begins using the triple-alpha process, the temperature rapidly increases, further raising the helium fusion rate and, because degenerate matter is a good conductor of heat, widening the reaction region.

Once these fats or oils are filtered from their hydrocarbons and then combined with alcohol like methanol, biodiesel is brought to life from this chemical reaction.

Once the result is announced, her reaction will depend on her overall status.

Once a fire has started, the resulting exothermic chain reaction sustains the fire and allows it to continue until or unless at least one of the elements of the fire is blocked.

Once this occurs, the sperm is capable of binding with the zona pellucida, and the acrosome reaction can occur.

After a couple of years at the University of Colorado, Reed moved to California after realizing he had some talent as a musician, and recorded " Once Again " for Imperial Records as a one-off single to see if reaction to it would justify a full contract.

Once the pilot maneuvers the aircraft so that the target and pipper are superimposed, he or she fires the weapon, or on some aircraft the weapon will fire automatically at this point, in order to overcome the reaction delay of the pilot.

Once a pattern has been indexed, this characterizes the reaction product and identifies it as a new solid phase.

Moreover, unlike in North America, the song failed to get enough attention to establish itself as a hit song in even their markets at the time of its release, because another songs from Houston's debut album ―" All at Once " or " Saving All My Love for You "― got a better reaction than the song from the public and the media, particularly in Europe, and the early promotion for the album was also stratagemically focused on those of songs.

Once ruptured, the exposed pigments cause a foreign body reaction and inflammation.

Once all N-bromosuccinimide ( which is denser than the solvent ) has been converted to succinimide ( which floats on top ) the reaction has finished.

Once more, in other words, Steele is said to be indebted to Swift for his `` wit '' ; ;

Once the scene is set, Trevelyan skilfully builds up the tense story until it reaches its climax in the dramatic victory of Marlborough and Eugene of Savoy at Blenheim.

Once he has been identified, however, a new melody is used to accompany his narrative, a bleak motif with barren octaves creating a rather ancient effect:

Once again what has happened is an all-consuming confabulation of the incidentals, the accidents of painting.

Once the grains are ground, vitamin E begins to deteriorate immediately and half of it is lost by oxidation and exposure to the air within one week.

Once more the fallacious equation is advanced to argue that since business is restricted under the anti-monopoly laws, there must be a corresponding restriction against labor unions: the law must treat everybody equally.

One of the finest soft shoe tunes ever invented, `` Once In Love With Amy '' is also, of course, one of the most tantalizingly persistent of light love lyrics to come out of American musical comedy in our era.

Miss Tamiris' `` Once Upon A Time '' is a problem piece about a man and a woman and the three `` figures '' that bother them somehow.

Once a predator has sampled one of these, it is likely to remember the colouration next time it encounters a similar animal.

Once the beams are laid across the building, it is then time to begin the placing of adobe bricks to create the roof.

Once programmed, it is able to choreograph its motions and gestures with its voice.

Once the physical therapist determines that the individual is able to safely perform parts of the program independently, it is important that the individual be prescribed and regularly engage in a supplementary home exercise program that incorporates these components to further improve long term outcomes.

Once chosen, he must request blessing: the blessing of an abbot is celebrated by the bishop in whose diocese the monastery is or, with his permission, another abbot or bishop.

Once a movement per unit time is observed, astronomers compensate for the parallax caused by the earth ’ s motion during this time and the heliocentric distance to this object is calculated.

Once the anchor is hauled up to the hawsepipe, the ring end is hoisted up to the end of a timber projecting from the bow known as the cathead.

Once the desired scope is laid out, the vessel should be gently forced astern, usually using the auxiliary motor but possibly by backing a sail.

Once again it is important to bear in mind the lack of ' neutral ' state intervention.

Once cytochrome c is released it binds with Apoptotic protease activating factor-1 ( Apaf-1 ) and ATP, which then bind to pro-caspase-9 to create a protein complex known as an apoptosome.

Once when she is, in a key scene, finally invited by the male members of the country club she gives a toast citing from the song “ With rue my heart is laden ”.